Aggregate: sand and gravel
Industrial stormwater general permit quarterly sampling: Jan. 21, April 21, July 21, and Oct. 21: Industrial stormwater general permit annual reporting: March 31: ... Sand and gravel: Subpart OOO standards for particulate matter and opacity compliance audit (ea-s6-07) Sand and gravel: Deviations and submittals compliance audit (ea-s6 …
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